Cache# class Cache# Bases: ABC Methods Summary delete(key) rtype None exists(key) rtype bool get(key) rtype Optional[Any] get_all() rtype List[Tuple[str, Any]] set(key, value) rtype None Methods Documentation abstract delete(key)# Return type None abstract exists(key)# Return type bool abstract get(key)# Return type Optional[Any] abstract get_all()# Return type List[Tuple[str, Any]] abstract set(key, value)# Return type None